1. Compute SHA-256 of OTSCanonicalRecord value → must equal OTSHash 2. Open OTSProofURL → extract Bitcoin block number → must equal OTSBitcoinBlock 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Read CopyrightID inside OTSCanonicalRecord → must equal the CopyrightID above 5. GET OTSVerificationAPI → pre-computed 6-check result from server 6. If all match: this entity was registered on CopyrightChains at OTSTimestamp, independently verifiable on Bitcoin
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x07a8eeb52c3f3080d50c5b5e17deb9096c99450893ee0a101f154b9e128e8fd8. Chain 2 (Bitcoin): anchored in block 953717 (2026-06-15T01:05:33Z). Bridge: the canonical record inside this Bitcoin proof contains the same CopyrightID. Verify: download https://artists.proofprofile.net/proofs/artist/87b58a3e-670e-4849-81c2-b7d40ef38b0b.json and https://artists.proofprofile.net/proofs/artist/87b58a3e-670e-4849-81c2-b7d40ef38b0b.ots, run `ots verify -f record.json proof.ots` (https://opentimestamps.org).
1. Confirm isrcCode identifies the recording in the pre-2022 source corpus and cc-db-prod record 2. GET OTSVerificationAPI → server-side canonical-record, hash, and attestation checks must pass 3. GET OTSBitcoinBlockVerifyURL → returns the Bitcoin block hash at height OTSBitcoinBlock; GET https://blockstream.info/api/block/{that hash} → its timestamp must match OTSTimestamp 4. Confirm CopyrightID is the CopyrightChains transaction hash 5. If all match: the cc-db-prod record is independently anchored on Bitcoin at OTSTimestamp
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x441bd24caa8ff992a27bbda9b9db46a2a0d76c2c182d5a8730c12508ee8dda39. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZDA82294027.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe7c29c9b5f7ca1a433a3fefc923cab050e85903702f9cd4dee416a3e358390be. Chain 2 (Bitcoin): anchored in block 956826 (2026-07-05T19:27:56Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62240711.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x5ac41597078fc8ac17aaf009a5cf77bd1b233e1ab7fbb5e6dcfd1c405e6dac55. Chain 2 (Bitcoin): anchored in block 958180 (2026-07-15T20:26:45Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZES62240720.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x31e6bdd72af9ccfcf458eb37d51ad7b81c785cfae2ebc15b43f0c550108bdeb8. Chain 2 (Bitcoin): anchored in block 956725 (2026-07-05T01:12:41Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWX2352661.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x1e8fd3a6144bbced78bcef35973563efb0ab386d1b83e57600fd942de9a59535. Chain 2 (Bitcoin): anchored in block 958942 (2026-07-21T00:24:07Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWY2332800.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x08629b9db3297e8b4c54a39a8b0e5cbd43d4704cedee303486aa3ff61480d5cf. Chain 2 (Bitcoin): anchored in block 958276 (2026-07-16T12:25:13Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2338235.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x401796bb4f3c7542d3264d3242150e3360828c0592d2f1611e568ff1b6757e4e. Chain 2 (Bitcoin): anchored in block 956891 (2026-07-06T07:16:32Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2338236.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x068c4ce947123edae107da41aa12b5f48049356ee13f2bd203b49a4359433768. Chain 2 (Bitcoin): anchored in block 958245 (2026-07-16T05:50:22Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2338239.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x8b8d9141b4238f598f56986d18c239bc3a39288ee13c11c4c105e3afb85abee0. Chain 2 (Bitcoin): anchored in block 956728 (2026-07-05T01:43:49Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2338240.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0f8bd2e7f3810f83e5ba9734f832ec410b96bfe400d7fd643f5d7f2d01753210. Chain 2 (Bitcoin): anchored in block 958362 (2026-07-17T04:32:48Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2338243.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x7bb5dcfb97fc715c624b3b4f9fbd8aa481bfecf8fa3d9578d708df090c9dee70. Chain 2 (Bitcoin): anchored in block 958468 (2026-07-18T00:27:51Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWR2338244.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x0fe50b53fd5022c62973329fcc95e179ce37f7f9b20569c8df7a7f72f77f171c. Chain 2 (Bitcoin): anchored in block 956745 (2026-07-05T05:33:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZFZ42314707.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xe4b96c2f4230867f0f0980c3e3a757b007b0d1f4846a25f63315ee07815d61cc. Chain 2 (Bitcoin): anchored in block 958955 (2026-07-21T03:03:40Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2471200.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xcb53ef606b8603ad9f37b6abcb8cbfe33e933617c7f2460080130fda61a3c3ec. Chain 2 (Bitcoin): anchored in block 958853 (2026-07-20T11:05:59Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2471201.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xb110c9810dfd16fac960c68c974232ea2405d9584dcb527dff511ccd4acadf18. Chain 2 (Bitcoin): anchored in block 959009 (2026-07-21T15:02:35Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2471202.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x70ea94c79de5d1d153bf2f375b8e33704ec0b5d2d71bb249f5a8e02c197a3870. Chain 2 (Bitcoin): anchored in block 958761 (2026-07-19T20:11:06Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2471203.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xa1db14e4e44cb639b7b130cd649ab78c2a4a1ff2dca033ffbbd5402278efef15. Chain 2 (Bitcoin): anchored in block 956822 (2026-07-05T18:48:28Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZTAX2471204.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x18778d6d44f72cd5994ef4ce37a257368e6eeab59f5d92c00f4429b6ba4ad21f. Chain 2 (Bitcoin): anchored in block 958867 (2026-07-20T14:03:08Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZNWQ2599337.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0xddbd668effa08ef9aa0ccd6b27d9b004808992b425b05ce313bba7f1e2d3896c. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QZZ7X2564911.
Dual-chain trust anchor. Chain 1 (CopyrightChains): CopyrightID 0x2d7545ee011f5fc1051bd4c25e19c17a736ed1c90e080059d95d8b5d204ee03b. Chain 2 (Bitcoin): anchored in block 956772 (2026-07-05T10:01:46Z), registered by our registry partner. The server verifies the private canonical record against OTSHash without exposing internal provider keys. Confirm the public ISRC, CopyrightID, and Bitcoin evidence via https://artists.proofprofile.net/api/v1/bot/ots/verify/track/QT3F72551197.